U.S. patent application number 15/412314 was filed with the patent office on 2018-01-25 for miniature speaker.
This patent application is currently assigned to AAC Technologies Pte. Ltd.. The applicant listed for this patent is Lubin Mao. Invention is credited to Lubin Mao.
Application Number | 20180027334 15/412314 |
Document ID | / |
Family ID | 57972182 |
Filed Date | 2018-01-25 |
United States Patent
Application |
20180027334 |
Kind Code |
A1 |
Mao; Lubin |
January 25, 2018 |
Miniature speaker
Abstract
A miniature speaker includes a frame and a vibrating system
accommodated in the frame. The vibrating system includes a
diaphragm fixed on the frame and a voice coil for driving the voice
diaphragm to vibrate. The speaker further includes a magnetic
circuit system. The diaphragm includes a first suspension
positioned at a middle portion thereof, a second suspension
positioned at an edge thereof, and a dome connecting the first
suspension with the second suspension; and the magnetic circuit
system is connected with the first suspension and is suspended in
the frame by the first suspension.
Inventors: |
Mao; Lubin; (Shenzhen,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Mao; Lubin |
Shenzhen |
|
CN |
|
|
Assignee: |
AAC Technologies Pte. Ltd.
Singapore city
SG
|
Family ID: |
57972182 |
Appl. No.: |
15/412314 |
Filed: |
January 23, 2017 |
Current U.S.
Class: |
381/398 |
Current CPC
Class: |
H04R 7/18 20130101; H04R
9/06 20130101; H04R 9/025 20130101; H04R 7/127 20130101 |
International
Class: |
H04R 9/06 20060101
H04R009/06; H04R 9/02 20060101 H04R009/02; H04R 7/12 20060101
H04R007/12; H04R 7/18 20060101 H04R007/18 |
Foreign Application Data
Date |
Code |
Application Number |
Jul 21, 2016 |
CN |
201620776467.X |
Claims
1. A miniature speaker, including: a frame; a vibrating system
accommodated in the frame, the vibrating system including a
diaphragm fixed on the frame and a voice coil for driving the voice
diaphragm to vibrate; a magnetic circuit system; wherein the
diaphragm includes a first suspension positioned at a middle
portion thereof, a second suspension positioned at an edge thereof,
and a dome connecting the first suspension with the second
suspension; and the magnetic circuit system is connected with the
first suspension and is suspended in the frame by the first
suspension.
2. The miniature speaker as described in claim 1 further comprising
a spring fixed in the frame and supporting the magnetic circuit
system elastically.
3. The miniature speaker as described in claim 2, wherein the
spring comprises a main body supporting the magnetic circuit
system, and an extended part extending from an outer edge of the
main body and connected with the frame.
4. The miniature speaker as described in claim 3, wherein the frame
comprises a frame main body, and a projecting part extending from
the frame main body away from the vibrating system; the extended
part is connected with the projecting part.
5. The miniature speaker as described in claim 1, wherein the
magnetic circuit system comprises a yoke and a magnetic part
arranged on the yoke; the magnetic part comprises a first magnetic
part connecting with the first suspension and a second magnetic
part arranged around the first magnetic part for forming a magnetic
gap; at least one of the first magnetic part and the second
magnetic part includes a permanent magnet.
6. The miniature speaker as described in claim 5, wherein the first
magnetic part comprises a first main magnet arranged on the yoke, a
main pole plate and a second main magnet overlapped on the first
main magnet; the same magnetic poles of the first main magnet and
the second main magnet are arranged face to face; one side of the
second main magnet far from the main pole plate is connected with
the first suspension.
7. The miniature speaker as described in claim 5, wherein the
second magnetic part comprises an auxiliary magnet arranged on the
yoke and an auxiliary pole plate attached to the auxiliary
magnet.
8. The miniature speaker as described in claim 1 further comprising
a gasket attached to one side of the voice diaphragm far from the
frame.
Description
FIELD OF THE INVENTION
[0001] The invention is related to electro-acoustic transducers,
more particularly to a miniature speaker used in a portable
consumer device.
DESCRIPTION OF RELATED ART
[0002] With the coming of mobile internet times, the quantity of
intelligent mobile device is rising continuously. Among many mobile
equipment, mobile phone is the most common and portable mobile
terminal equipment. At present, the function of mobile phone is
diversified. One of important functions is that of high quality
music, and the miniature speaker in mobile phone is one of the
essential conditions of realizing the function of high quality
music.
[0003] In relevant technology, the miniature speaker shall produce
sound by vibrating the diaphragm by using the voice coil. The
following problems may occur when the above-mentioned sounding
method is taken: 1. The sensitivities of medium-high frequencies of
the miniature speaker are high, while the sensitivity of low
frequency is relatively low as a result of high resonant frequency
of the miniature speaker when the volume of the cavity is kept
still; the vibrating mass shall be increased in order to reduce the
resonant frequency and improve the sensitivity of low frequency of
the miniature speaker, but the sensitivity of high frequency of the
miniature speaker would be reduced.
[0004] Therefore, it is necessary to provide an improved miniature
speaker to overcome above disadvantage.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] Many aspects of the embodiments can be better understood
with reference to the following drawings. The components in the
drawings are not necessarily drawn to scale, the emphasis instead
being placed upon clearly illustrating the principles of the
present disclosure. Moreover, in the drawings, like reference
numerals designate corresponding parts throughout the several
views.
[0006] FIG. 1 is an isometric view of a miniature speaker in
accordance with a first exemplary embodiment of the present
disclosure.
[0007] FIG. 2 is an exploded view of the miniature speaker in FIG.
1.
[0008] FIG. 3 is a cross-sectional view of the miniature speaker
taken along line A-A in FIG. 1.
[0009] FIG. 4 is an isometric view of a miniature speaker in
accordance with a second exemplary embodiment.
DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS
[0010] The present invention will hereinafter be described in
detail with reference to several exemplary embodiments. To make the
technical problems to be solved, technical solutions and beneficial
effects of the present disclosure more apparent, the present
disclosure is described in further detail together with the figures
and the embodiments. It should be understood the specific
embodiments described hereby are only to explain this disclosure,
not intended to limit this disclosure.
Embodiment 1
[0011] Referring to FIGS. 1-3, a miniature speaker 100 in
accordance with a first embodiment of the present disclosure
comprises a frame 1 having an accommodating space 10, a magnetic
circuit system 2, and a vibrating system 3 accommodated in the
accommodating space 10. The vibrating system 3 is driven by the
magnetic circuit system 2 to produce sound by vibration.
[0012] The magnetic circuit system 2 comprises a yoke 21 which is
arranged in the accommodating space 10 and a magnetic part 22
arranged in the yoke 21. The yoke 21 is a flat plate.
[0013] The magnetic part 22 comprises a first magnetic part 221 and
a second magnetic part 222; the second magnetic part 222 is
arranged around the first magnetic part 221 and forms a magnetic
gap 223 with the first magnetic part 221.
[0014] The first magnetic part 221 comprises a first main magnet
2211 which is arranged on the yoke 21, a main pole plate 2212 which
is overlapped on the first main magnet 2211 and a second main
magnet 2213 which is overlapped on the main pole plate 2212; and
the same magnetic poles of the first main magnet 2211 and the
second main magnets 2213 are arranged face to face.
[0015] The quantity of the second magnetic parts 222 is four, and
comprises an auxiliary magnet 2221 arranged on the yoke 21 and an
auxiliary pole plate 2222 overlapped on the auxiliary magnet 2221.
Moreover, the vibrating system 3 comprises a voice diaphragm 31 and
a voice coil 33 which drives the voice diaphragm 31 to vibrate.
[0016] The miniature speaker 100 further comprises a gasket 32
which is overlapped on one side of the voice diaphragm 31 far from
the frame 1.
[0017] The voice diaphragm 31 comprises a first suspension 311, a
dome 312 and a second suspension 313, wherein the first suspension
311 is positioned at the middle place of the voice diaphragm 31.
The second suspension 313 is positioned on an edge of the voice
diaphragm 31, and the dome 312 connects the first suspension 311
with the second suspension 313; the first magnetic part 221 is
fixed on internal periphery of the first suspension 311; the first
suspension 311 is connected with the first magnetic part 221
fixedly, therefore the magnetic circuit system 2 is suspended in
the frame 1; one end of the second suspension 313 far from the dome
312 is connected with the frame 1, specifically the second
suspension 313 is connected with the frame 1 on one side opposite
to the yoke 21.
[0018] The gaskets 32 are arranged one side of the frame 1 opposite
to the yoke 21 and are presented as the hollow rings. One end of
the voice coil 33 is connected with the dome 312, and the other end
thereof is inserted into the magnetic gap 223.
[0019] The voice diaphragm 31 is driven by the voice coil 33 to
vibrate in order to give out sound in presence of magnetic field
force of the magnetic circuit system 2 when the voice coil 33 is
electrified; therefore the high sensitivities of medium-high
frequencies can be implemented; at the same time, the magnetic
circuit system 2 is driven by the first suspension 311 of the voice
diaphragm 31 to vibrate, therefore the high sensitivity of low
frequency can be implemented.
Embodiment 2
[0020] Referring to FIG. 4, the main differences of Embodiment 2
from Embodiment 1 are as follows:
[0021] The miniature speaker 200 in the present disclosure further
comprises a spring 4 for supporting the magnetic circuit system 2
elastically, wherein the spring 4 comprises a main body 41
connecting with the magnetic circuit system 2' and an extended part
42 formed in the way of extending from the outer edge of the main
body 41; the extended part 42 is connected with the frame 1
fixedly; the main body 41 is presented as a ring in shape, while
the extended part 42 is presented as a bent part. Moreover,
multiple extended parts 42 are arranged; and the number thereof 42
is 4 in this embodiment.
[0022] The frame 1' comprises a frame main body 11 and a projecting
part 12 formed in the way of extending from the frame main body 11.
The extended part 42 is connected with the projecting part 12
fixedly. Moreover, multiple projecting parts 12 are arranged; and
the number thereof is 4 in this embodiment.
[0023] Compared with related technology, the advantages of the
present disclosure are that:
[0024] 1. The vibration system comprises the voice diaphragm and
the voice coil. The voice diaphragm is set to comprise the first
suspension and the second suspension. The voice coil do vibration
of normal middle and high frequency to achieve comparatively high
sensitivity for normal middle and high frequency. The circuit
system is connected with the first suspension and is suspended in
the frame by the first suspension, it can do vibration of low
frequency to achieve comparatively high sensitivity for low
frequency, so it is ensured to realize improving the sensitivity of
low frequency under the condition that sensitivity for the high
frequency doesn't change,
[0025] 2. The circuit system is supported by the spring, so the
problem that the first suspension possibly can not support the
magnet system can be prevented, which is good for the sealing of
the first suspension and vibration and sounding of the same.
[0026] It is to be understood, however, that even though numerous
characteristics and advantages of the present exemplary embodiments
have been set forth in the foregoing description, together with
details of the structures and functions of the embodiments, the
disclosure is illustrative only, and changes may be made in detail,
especially in matters of shape, size, and arrangement of parts
within the principles of the invention to the full extent indicated
by the broad general meaning of the terms where the appended claims
are expressed.
* * * * *